Thisone's a jam by Jefferson Airplane, Quicksilver Messenger Service, Big Brother & The Holding Company. I found it on sugarmegs (again!) and the last 2 tracks feature Marty on lead vocals and GRACE AND JANIS on backing vocals!! It's amazing!! Here's the setlist. Enjoy It!

1 [00:24] excerpt of announcer at New Year's Eve midnight

2 [05:50] Baby What You Want Me To Do? (featuring John Cipollina and Jorma Kaukonen guitar with Dino Valenti and Gary Duncan vocals

3 [02:59] instrumental led off by Jorma Kaukonen with John Cipollina and Gary Duncan also on guitar >

I'm sorry, I thought I posted the link!! it's tela.sugarmegs.org and type "Quicksilver Janis Grace" on the search bar and click download on the first link, called Jams1967-12-31JeffersonAirplaneQMSBigBrotherWinterlandSanFranciscoCA.asx and click DOWNLOAD!